I have two currently. A Summer Bag and a Winter Bag.
Summer Carry, NiteIze

Winter Carry
Maxpedition
Same as Summer, but room for a hat, gloves, jacket.

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After a bad opening, there is hope for the middle game.
After a bad middle game there is hope for the end game.
But once you are in the endgame, the moment of truth has arrived -
Edmar Mednis